Improvement in boilers



A. .LLBGRANE BOILBR. No. 93,725. Patented Aug. Y17, 18.69.

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ALFRED JOHN LE GRAND, OF BOONTN,l NEW JERSEY".

Letters Patent No. 93,7 25, dated August 17, 41869.

IMPROVEMENT IN BOILERS.

The Schedule referred to in these Letters Patent. and making part of the same.

To all whom lit may conce/rn:

Be it known that I, ALFRED JOHN Ln GRAND, of Boonton, in the county of Mori-is, and Sta-te of New Jersey, jhave invented a new and useful Improve' ment in Boilers; and VI do'herebydeclare that the following is a full, clear, and exact description plicable also to 'boilers used for generating steam ford obtaining power.f

The invention consistsin the arrangement of heats ing, supply, and delivery-tubes, all as hereinafter specified. l

Figure l represents a sectional elevation of my improved boiler', and

Figure 2 represents a transverse section of the salue, taken on the-line a: :v of tig. '1.

l Similar letters of reference indicate corresponding parts.

A represents a cylindrical shell, having tubes B arf ranged to pass through it, from end to end, and made larger at the bottom than at the top, which I consider has a better eiect in impart-ing the heat which passes up along the tubes to the water within.

' lC) represents main-supply or letm'intubes, opening into the sides of the cylinder A, near the bottom. lo these I connect a-circular tube, D, encircling the cylinder at some distance from it, and connected to it by four, more or less, supporting-tubes, E, through which the water also flows.

F represents the main hot-water or steam-pipe, to

which curved branchfpipes G, leading from the top of f the cylinder, are connected, a short distaucc'above th(l top. Y

I propose to construct small boilers, for horticultural and other buildings, of the above-described arrange; ment, by casting them all iu one piece, whereby they may be cheaply made; and, in setting them up for use, I propose to arrange them in a brick arch or tire-place,

in such a way that the heat will not only pass 'freely through the tubes B, but also around the exterior surface ot' the cylinder A, andthe pipesl C D and F Gf` thus affording a very great amount of lire-surface, whereby very much smaller and less expensive ,boilers` may serve to supply a sufficient amount of heat, than by the common arlangement.

Having thus described my invention, I claim as new, and desire to secure by Letters Patent- The cylinder A, vertical tubes B, return-tubes .C D E, and hot-water tubes F G, all combined and arranged substantially as specified.

ALFRED JOHN LE GRAND.

Witnesses:

ALEXANDEI; HALLEY, ELI WORMAN. 

